文献类型：期刊文献

英文题名：La2O3 modified silica-pillared clays supported PtOx nanocrystalline catalysts for catalytic combustion of benzene

作者：Cheng, Zhen[1];Feng, Binbin[1];Chen, Zhu[1];Zheng, Jie[1];Li, Jing[2];Zuo, Shufeng[1]

机构：[1]Shaoxing Univ, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China;[2]Liaocheng Univ, Coll Chem & Chem Engn, Shandong Prov Key Lab Chem Energy Storage & Novel, Liaocheng 252059, Shandong, Peoples R China

年份：2020

卷号：392

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：SCI-EXPANDED(收录号：WOS:000525862500105)、、WOS

基金：This paper was supported by the National Natural Science Foundation of China (No. 21577094 and No. 21902069), Zhejiang Public Welfare Technology Research Project (No. LGG19B070003) and the Foundation of Science and Technology of Shaoxing City (No. 2018C10019). The authors would like to acknowledge the financial support from Innovation Team of Huzhou South Taihu Elite Program. Moreover, we would also be grateful to Zhejiang Da-Feng automobile technology co., Ltd for the related experiment and test.

语种：英文

外文关键词：La2O3; Silica-pillared clay; PtO(x )nanocrystal; Benzene; Catalytic combustion

外文摘要：La2O3 modified silica-pillared clays (SPC) was synthesized by a soft template method. Both the basal spacing and the specific surface area increased after pillaring and modification, and the thermal stability was also improved, all of which could reduce the mass transfer resistance and improve the adsorption capacity of benzene. PtOx nanocrystalline catalysts were prepared by a high-temperature liquid reduction method. Among them, the catalyst with 0.2 wt% N loading and a La/KSF molar ratio of 0.5:1 (0.2% Pt/LaSPC (0.5:1)) showed the highest catalytic combustion activity and higher CO2 selectivity, and the reaction temperature for benzene combustion was about 200 degrees C. Besides, the Pt-0, Pt2+ and Pt4+ with particle sizes of about 3-5 nm coexisted on the surface of LaSPC (0.5:1). And this catalyst also exhibited good stability during the 100 h continuous reactions at 195 degrees C. The high dispersion of N particles, active oxygen species and strong redox property are responsible for the high activity of 0.2% Pt/LaSPC (0.5:1) for benzene combustion.